经济作物有胡麻 、 油菜 、 黄花 、 杏 、 苹果等.Economic crops include flax, canola, yellow, apricot, apple and so on.胡麻是一种重要的油料作物.The flax is one of the important oil crops.胡麻籽中含有诸多的营养保健功能成分.Many nutrition health protection functional comp...
看看这些红色矿物颗粒, 它们具有双晶以及完全解理.Look at these grains. They have twins and perfect cleavages.可用区内不允许存在电学或光学双晶.N o electrical or optical twinning shall be allowed in usable zones.斜长石通常呈白色,具有完全解理和聚片双晶.Plagioclase is usually white ...
The authors show that the hyperboloid of one sheet and the hyperbolic paraboloid are ruled surfaces.作者证实:单叶双曲面和双曲抛物面是直线曲面.The mathematical model of the hyperboloid twist drill was introduced.介绍了以旋转单叶双曲面作麻花钻钻尖后刀面的数学模型.The...